package com.heima.kafka.controller;

import com.alibaba.fastjson.JSON;
import com.heima.kafka.pojos.User;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.kafka.core.KafkaTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

/**
 * kafka入门案例
 * 消息生产者
 * */
@RestController
public class HelloController {
    @Autowired
    private KafkaTemplate<String,String> kafkaTemplate;

    //传递消息为字符串
    @GetMapping("/hello")
    public String hello(){
        kafkaTemplate.send("itcast-topic","kafka入门案例");
        return "OK";
    }

    //传递消息为对象
    @GetMapping("/object")
    public String object(){
        User user = new User();
        user.setName("zhangsan");
        user.setAge(18);

        kafkaTemplate.send("user-topic", JSON.toJSONString(user));
        return "OK";
    }
}
